Air cylinder



FIG. 1 is a top, front and right side perspective view of an air cylinder thereof showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof;

FIG. 8 is a front elevational view thereof showing the rods in an extended state;

FIG. 9 is a sectional view taken along line 9--9 of FIG. 4; and,

FIG. 10 is a sectional view taken along line 10--10 of FIG. 2. 

The ornamental design for an air cylinder, as shown and described. 